// StoreVariableStruct
//------------------------------------------------------------------------------
bool BFFParser::StoreVariableStruct( const AString & name,
const BFFIterator & valueStart, const BFFIterator & valueEnd,
const BFFIterator & operatorIter,
BFFStackFrame * frame )
{
// are we concatenating?
if ( *operatorIter == BFF_VARIABLE_CONCATENATION )
{
// concatenation of structs not supported
Error::Error_1027_CannotModify( operatorIter, name, BFFVariable::VAR_STRUCT, BFFVariable::VAR_ANY );
return false;
}
// create stack frame to capture variables
BFFStackFrame stackFrame;
// parse all the variables in the scope
BFFParser subParser;
BFFIterator subIter( valueStart );
subIter.SetMax( valueEnd.GetCurrent() ); // limit to closing token
if ( subParser.Parse( subIter ) == false )
{
return false; // error will be emitted by Parse
}
// get variables defined in the scope
const Array< const BFFVariable * > & structMembers = stackFrame.GetLocalVariables();
// Register this variable
BFFStackFrame::SetVarStruct( name, structMembers, frame ? frame : stackFrame.GetParent() );
FLOG_INFO( "Registered <struct> variable '%s' with %u members", name.Get(), structMembers.GetSize() );
return true;
}
// ParseUnnamedScope
//------------------------------------------------------------------------------
bool BFFParser::ParseUnnamedScope( BFFIterator & iter )
{
// find the matching bracket
BFFIterator scopeStart( iter );
if ( iter.ParseToMatchingBrace( BFF_SCOPE_OPEN, BFF_SCOPE_CLOSE ) == false )
{
Error::Error_1025_MissingScopeCloseToken( scopeStart, nullptr );
return false;
}
// create stack for scope
BFFStackFrame stackFrame;
// parse the scoped part
BFFParser subParser;
BFFIterator subIter( scopeStart );
subIter++; // skip opening token
subIter.SetMax( iter.GetCurrent() ); // limit to closing token
if ( subParser.Parse( subIter ) == false )
{
return false;
}
iter++; // skip closing }
return true;
}
// ParseFunction
//------------------------------------------------------------------------------
/*virtual*/ bool Function::ParseFunction( const BFFIterator & functionNameStart,
const BFFIterator * functionBodyStartToken,
const BFFIterator * functionBodyStopToken,
const BFFIterator * functionHeaderStartToken,
const BFFIterator * functionHeaderStopToken ) const
{
m_AliasForFunction.Clear();
if ( AcceptsHeader() &&
functionHeaderStartToken && functionHeaderStopToken &&
( functionHeaderStartToken->GetDistTo( *functionHeaderStopToken ) > 1 ) )
{
// find opening quote
BFFIterator start( *functionHeaderStartToken );
ASSERT( *start == BFFParser::BFF_FUNCTION_ARGS_OPEN );
start++;
start.SkipWhiteSpace();
const char c = *start;
if ( ( c != '"' ) && ( c != '\'' ) )
{
Error::Error_1001_MissingStringStartToken( start, this );
return false;
}
BFFIterator stop( start );
stop.SkipString( c );
ASSERT( stop.GetCurrent() <= functionHeaderStopToken->GetCurrent() ); // should not be in this function if strings are not validly terminated
if ( start.GetDistTo( stop ) <= 1 )
{
Error::Error_1003_EmptyStringNotAllowedInHeader( start, this );
return false;
}
// store alias name for use in Commit
start++; // skip past opening quote
if ( BFFParser::PerformVariableSubstitutions( start, stop, m_AliasForFunction ) == false )
{
return false; // substitution will have emitted an error
}
}
// parse the function body
BFFParser subParser;
BFFIterator subIter( *functionBodyStartToken );
subIter++; // skip past opening body token
subIter.SetMax( functionBodyStopToken->GetCurrent() ); // cap parsing to body end
if ( subParser.Parse( subIter ) == false )
{
return false;
}
// complete the function
return Commit( functionNameStart );
}
// ParseIncludeDirective
//------------------------------------------------------------------------------
bool BFFParser::ParseIncludeDirective( BFFIterator & iter )
{
// Sanity check include depth to detect cyclic includes
if ( s_Depth >= 128 )
{
Error::Error_1035_ExcessiveDepthComplexity( iter );
return false;
}
// we expect a " quoted string
if ( *iter != '"' )
{
Error::Error_1031_UnexpectedCharFollowingDirectiveName( iter, AStackString<>( "include" ), '"' );
return false;
}
BFFIterator stringStart( iter );
stringStart++; // first actual character
// find end of string
if ( iter.ParseToNext( '"' ) == false )
{
Error::Error_1012_UnexpectedEndOfFile( iter );
return false;
}
// unescape and substitute variables
AStackString<> include;
if ( PerformVariableSubstitutions( stringStart, iter, include ) == false )
{
return false;
}
iter++; // skip closing quote before returning
FLOG_INFO( "Including: %s\n", include.Get() );
// open include
// 1) Try current directory
AStackString<> includeToUse;
if (PathUtils::IsFullPath(include) == false)
{
const char * lastSlash = iter.GetFileName().FindLast( NATIVE_SLASH );
lastSlash = lastSlash ? lastSlash : iter.GetFileName().FindLast( OTHER_SLASH );
lastSlash = lastSlash ? ( lastSlash + 1 ): iter.GetFileName().Get(); // file only, truncate to empty
includeToUse.Assign( iter.GetFileName().Get(), lastSlash );
}
includeToUse += include;
AStackString<> includeToUseClean;
NodeGraph::CleanPath( includeToUse, includeToUseClean );
FileStream f;
if ( f.Open( includeToUseClean.Get(), FileStream::READ_ONLY ) == false )
{
Error::Error_1032_UnableToOpenInclude( stringStart, includeToUseClean );
return false;
}
// check if include uses "once" pragma
if ( FBuild::Get().GetDependencyGraph().IsOneUseFile( includeToUseClean ) )
{
// already seen, and uses #once : don't include again
return true;
}
uint64_t includeTimeStamp = FileIO::GetFileLastWriteTime( includeToUseClean );
// read content of include
const uint32_t fileSize = (uint32_t)f.GetFileSize();
AutoPtr< char > mem( (char *)ALLOC( fileSize + 1 ) );
if ( f.Read( mem.Get(), fileSize ) != fileSize )
{
Error::Error_1033_ErrorReadingInclude( stringStart, include, Env::GetLastErr() );
return false;
}
mem.Get()[ fileSize ] = '\000'; // sentinel
BFFParser parser;
const bool pushStackFrame = false; // include is treated as if injected at this point
return parser.Parse( mem.Get(), fileSize, includeToUseClean.Get(), includeTimeStamp, pushStackFrame );
}
